KUKU

KU ScholarWorks

  • myKU
  • Email
  • Enroll & Pay
  • KU Directory
    • Login
    View Item 
    •   KU ScholarWorks
    • Dissertations and Theses
    • Dissertations
    • View Item
    •   KU ScholarWorks
    • Dissertations and Theses
    • Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Large-eddy simulations of turbulent flows using the high-order FR/CPR method

    Thumbnail
    View/Open
    Li_ku_0099D_14932_DATA_1.pdf (4.064Mb)
    Issue Date
    2016-12-31
    Author
    Li, Yanan
    Publisher
    University of Kansas
    Format
    103 pages
    Type
    Dissertation
    Degree Level
    D.Eng.
    Discipline
    Aerospace Engineering
    Rights
    Copyright held by the author.
    Metadata
    Show full item record
    Abstract
    Large eddy simulation (LES) was originally proposed for simulating atmospheric flows and then has become one of the most successful methodologies for turbulence simulation for its good balance between accuracy and cost. In LES, energetic scales are resolved while the small equilibrium scales are modeled by the sub-grid scale(SGS) stress models. The resolution of the wide spectrum of the energetic scales is a big challenge for numerical methods. High-order methods are very promising in LES for its low dissipation and dispersion errors. For smooth turbulent flow, high-order methods have the potential to achieve high accuracy at lower cost than lower order methods. This thesis presents the investigation of the performance of different LES sub-grid scale stress (SGS) models with the high-order flux reconstruction or the correction procedure via reconstruction( FR/CPR) method. A mathematical analysis of scale similarity is conducted and presented as well. In addition, numerical schemes’ behavior in nonlinear wave propagation is studied and presented. The computationa of discontinuities, such as shocks, is another challenge to the numerical methods. In the simulation of shocks, non-physical oscillations can occur at the discontinuities and lead to divergence. The situation is worse for high-order methods. This thesis also presents a new flux limiter for the FR/CPR method. The new technique shows good properties, convergence for steady problems and accuracy preserving for vortex dominated flows. It is very promising in handling shock and turbulence interaction problems.
    URI
    http://hdl.handle.net/1808/24138
    Collections
    • Engineering Dissertations and Theses [1055]
    • Dissertations [4472]

    Items in KU ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.


    We want to hear from you! Please share your stories about how Open Access to this item benefits YOU.


    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

    Browse

    All of KU ScholarWorksCommunities & CollectionsThis Collection

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

    The University of Kansas
      Contact KU ScholarWorks
    Lawrence, KS | Maps
     
    • Academics
    • Admission
    • Alumni
    • Athletics
    • Campuses
    • Giving
    • Jobs

    The University of Kansas prohibits discrimination on the basis of race, color, ethnicity, religion, sex, national origin, age, ancestry, disability, status as a veteran, sexual orientation, marital status, parental status, gender identity, gender expression and genetic information in the University’s programs and activities. The following person has been designated to handle inquiries regarding the non-discrimination policies: Director of the Office of Institutional Opportunity and Access, IOA@ku.edu, 1246 W. Campus Road, Room 153A, Lawrence, KS, 66045, (785)864-6414, 711 TTY.

     Contact KU
    Lawrence, KS | Maps